Accuracy Adjustment; Axial Uniformity - Fluke 9118A User Manual

9118A
Users Manual

Accuracy Adjustment

To do an accuracy adjustment:
1. Calculate the new TEMP
Temp (new) = Temp
n
2. Put the Temp (new) value into the Product through
n
the front panel or RS-232 port. Table 16 is a list of
temperature setpoints and the RS-232 command and
front-panel name for the TEMP parameters.
Table 16. Accuracy Parameter for Isothermal Block
Setpoint
(°C)
RS-232 Command
300 SOUR:SENS:CAL:PAR1
700 SOUR:SENS:CAL:PAR2
1000 SOUR:SENS:CAL:PAR3
1200 SOUR:SENS:CAL:PAR4
3. After you put in the TEMP value, let the Product soak
for 60 minutes.
4. Do steps 1 through 6 of the Accuracy Test.
After the accuracy is verified or adjusted, it is
recommended that you do the axial uniformity verification
and adjustment that follows.
74
parameter with:
n
(old) - Accuracy
n
Parameter
Front Panel
TEMP (300)
TEMP (700)
TEMP (1000)
TEMP (1200)

Axial Uniformity

The steps that follow make up the axial uniformity test and
the formulae to calculate the SKEW and ZONE parameter
values. The new values are put into the Product to correct
for axial temperature gradients.
The axial uniformity test must be done before the
axial uniformity adjustment.
1. Respectively, move TC2 to one of the positions shown
in Table 17. TC1 is always fixed at the position 0 mm
as a reference in the period of moving TC2 at different
locations.
2. Let TC2 soak for a minimum of 5 minutes at this
position.
3. Record the temperature for TC1 and TC2 in below
Table 17.
Note